Web feeding mechanism



Aug. 30, 1938.V F. E. WELLER 2,128,868-

v WEB FEEDING' MEGHANISM Original Filed oct. 6, 1952 4 sheets-sheet 1 I"mmm I l HHM L fzzz zgn vzz` z2 M llullmu n "HU u A i.

MTAS

INVENTOR ATTORN EY Aug. 30, 1938. F. E. WELLER 2,128,868

WEB FEEDING MECHANISM Original Filed Oct. 6, 1932 4 Sheets-Sheet 2lNvENToR BYFranlc l'lmller 05ML sfuma v ATToR Evs Aug. 30, 1938. F. E.WELLER WEB FEEDING MECHANISM 4 Sheets-Sheet 3 Original Filed Oct. 6,1932 INVENTOR BY Frank EWeller W, M NM1. ATTORNEYJ Allg. 30, 19-38. F,WELLER 2,128,868

WEB FEEDING MECHANI SM Original Filed Oct. 6, 1932 4 Sheets-Sheet 4ATTORN YJ y Patented Aug. 30, 193% 2,128,868 y WEB FEEDING MEcnANrsMFrank E. Weller, Bloomfield, N. J., assigner to Trans-Lux Corporation,a. corporation of Delaware Original application October 6, 1932, SerialNo. 636,490. Divided and this application October 26, 1934, Serial No.750,079. Renewed January 6 Claims.

My invention relates to mechanism for feeding or drawing a printed webthrough a projection field.

In an important respect, my invention relates 5 to a combinedweb-feeding and -tensioning arrangement for feeding the web through aprojection field while maintaining the same taut and plane to insurehighly satisfactory image projection.

10 My invention has further reference to novel features andcharacteristics of mechanism of the character stated whereby saidmechanism may be efficiently and satisfactorily operated by aperson oflittle skill.

l5 Various other objects, advantages and characteristics of my inventionwill become apparent from the following detailed description taken inconnection with the accompanying drawings.

My invention resides in the feeding mecha- 2i) nism, arrangements andfeatures of the character hereinafter described and claimed. Y

This application is a division of my pending application Serial No.636,490, filed October 6, 1932.4

For an understanding of my invention and for an illustration of some ofthe forms thereof, reference is to be had to the accompanying drawings,in which:

Figure 1 is a side elevational view of mechanism as constructed inaccordance with my invention;

Fig, 2 is a side elevational View of the mechanism of Fig. 1 but withvarious parts in different positions;

Fig. 3 is an enlarged vertical sectional view, partly in elevation, ofmechanism as constructed in accordance with my invention;

Fig. 4 is a perspective view of a part of the mechanism shown in Fig. 3;

Fig. 5 is a plan view, with parts omitted, of a part of the mechanismshown in Fig. 3;

Fig. 6 is an elevational view, partly in sectionand is takenapproximately on the line 4,. 6--6 of Fig. 3 looking in the direction ofthe arrows; I

Fig. 7 is an elevational view, partly in section, and is takenapproximately on the line 1-1 of Fig. 3 looking in the direction of thearrows; 50 Fig. 7a is a sectional view, partly in pian, o1'

a part of the web-tensioning mechanism;

Fig. 8 is an elevational view illustrating a mod'cation of theinvention;

Fi 9 is a plan view of a part of the mecha- 55 nism shown in Fig. 8:

Fig. 10 is an elevational view, partly in section, and is taken on theline II0 of Fig. 9;

Fig. l1 is a vertical sectional view, partly in elevation, illustratinga modification of the invention;

Fig. 12 is a plan view, partly in section, of a part of the mechanismshown in Fig. 11; and

Fig. 13 is a vertical sectional view, partlyl in elevation, illustratingan arrangement for passing convection heat currents into contact with asection of the printed web.

In general, my invention relates to a combined printing device andprojector, said device p rinting news items on a web which is movedthrough the projector to project images of the printed characters on adisplay screen. Although combined devices of this general character arewell y known in the art, my invention is important because involvingnovel features contributing greatly to improved projection andsimplication of operation. I

For a detailed description of my invention, reference is to be first hadto Figs. 1 and `2, wherein C represents any suitable cabinet or housinghaving, as herein shown, a detachable or movable door d. Disposed withinthe cabinet C isra projector P and a printing device D, the latter beingmovable to the exterior of the cabinet C as hereinafter moreparticularly described.

As more fully described in U. S. Letters Patent No. 2,018,691, grantedOctober 29, 1935, I represents a base or support which may be suitablysecured to the vbottom wall .of the cabinet C. Rotatably mounted on thebase I is a turntable 2 which may carry a pivoted latch 3 coactable witha notch in the base I for retaining the parts in the normal positionshown in Fig. 1, the latch 3 being releasable, however, so that theturntable 2 may be rotated through an angle of 180 degrees into theposition shown in Fig. 2.

Upstanding from the turntable 2 is -a standard 4 on which the aforesaidprojector P is supported in any suitable manner.

Pivoted to opposite sides of the turntable 2 are the lower ends of twopairs of legs 5, and 6, 6, the upper ends of which are pivoted to atable 1. The latter carries a pair of spring-controlled latches 8, 8which coact, respectively, with latching members 9, 9 carried by thestandard 4. As clearly appears, the latches 8, 8 serve to retain theaforesaid pairs of legs in vertical position, Fig. 1, and, when saidlatches are released, said pairs of legs may be moved to inclinedposition as shown in Fig. 2 to the extent permitted by one or morechains I0, or equivalent.

The printing device D, in the example herein shown, is of the type knownto the art as a Dow- Jones printer. The printing mechanism proper isdetachablyretained on the table 'I by a frame plate II secured insuitable manner to said table l. Depending from the table I is a housingI2 for the motor and other operating parts of the printing. mechanism.

As well understood in the art, the printing device D comprises spaced,upstanding plates in which is journaled a horizontal shaft I3, Fig. 3,carrying a type wheel I4 having characters distributed around theperiphery thereof. The wheel I4 is freely slidable along the shaft I3but is keyed thereto for rotatable movement therewith. Coactable withthe type wheel I4 isan inking roller I5 to which ink is fed by a rollerI6, ink being supplied to the roller I6 in suitable manner as wellunderstood in the art. 'I'he rollers I5 and I6 are supported on asuitable frame I'I slidable on a rod I8 and with which the type wheel I4together with said rollers I5 and I6 are movable as a unit in eitherdirection longitudinally of the shaft I3. Coactable with the type wheelI4 is a platen or presser bar I9 which is normally biased to theposition shown in Fig. 3 and which is intermittently actuated, ashereinafter described, for printing purposes.

As shown in Figs. 1 and 2, a pair of the legs 5, 6 support a suitablebracket on which is mounted a reel 20 having a web W wound thereon. Thisweb, in the example shown, is of suitable transparent or translucentmaterial, such, for example. as Cellophane From the reel 20, the web Wextends upwardly between the type wheel I4 and platen I9, said web Wfurther extending through the projector P as hereinafter to bedescribed.

After the printing wheel I4 has been rotated to a selected position, theplaten I9 is actuated to thrust the Vweb W intoengagement with theselected character on said printing wheel.

The projector P comprises a housing 2| suitably supported on thestandard 4, said housing having disposed therein a lamp bulb 22 or othersuitable source of illumination. Light from the lamp 22 emerges as alight beam through a lateral opening 2Ia in the housing 2I.

Arranged in horizontal alinement with the aforesaid opening 2Ia is alight passage formed by a bottom wall 23 and spaced side walls 24 and24a, these walls forming a single casting which is suitably secured tothe lamp housing structure. Disposed in the light passage thus formedare a pair of condenserlenses 25, 25a which are detachably retained inoperative position in suitable manner, as by thetransverse rod 26 andspring members 21.

Transversely arranged with respect to the side walls 24, 24a is a front4wall 28, Figs. 3 and 7, which forms a part of another casting suitablysecured to the casting which comprises thewalls 23, 24, 24a and whichvis provided with an aperture 28a forming the projection field of theherein described projection mechanism, the condenser lens 25 alsoabutting said wall 28v as clearly shown in Fig. 3. Y

As illustrated particularly in Fig. 3, the aforesaid front wall 28comprises upper extensions 29v at the respective opposite sides thereof,'each of these extensions terminating in a pair of spaced ears 30, 30a,Fig. 7.

The extensions 29 of the front wall 28 form bearings for a. transverseshaft 3| on which a plurality of spaced rollers 32 are mounted forrotatable movement therewith. As shown particularly in Fig. 5, it isdesirable that each of the rollers 32 be provided with peripheral rowsof corrugations along the respective opposite sides thereof, these rowsof corrugations being separated by a channel disposed centrally thereof.

Depending from the aforesaid bottom wall 23 are a plurality of spacedears which support a transverse rod 33, Fig. 3. Mounted on the rod 33for free oscillatory movement are a plurality of spaced fingers 34.which extend in parallel relation beneath the wall 23. Figs. 3 and 7a,each finger 34 terminating in an inclined surface as shown in Fig. 3.The fingers 34 are positively biased for movement in a counterclockwisedirection, Fig. 3, and, to this end, it is desirable that each finger beformed with an olset mass of malterial 34a of sufficient weight toobtain the desired biasing effect. To prevent the operative ends of thefingers 34 from dropping unduly, it is desirable for each finger 34 tocomprise a section 34b through which is threaded a screw 35 Coactablewith the lower surface of the wall 23, Fig. 3.

Referring particularly to Figs. 3, 5 and 6, there is shown a frame 36which, along each side thereof, comprises a pair of spaced ears 31, 31aso arranged that one pair thereof fits snugly'between one pair of theears 30, 30a while the other pair thereof fits snugly between the otherpair of the ears 30, 30a. As shown on the drawings, a screw 38is'threaded through the pair of ears 30, 38a at the left, Fig. 7, andthe pair of ears 31, 31a. which are registered therewith. It results,therefore, that the frame 36 may be swung clockwise from the full to thebroken line position of Fig. 5 about the pin 38 as an, axis. The frame36 may positively be retained in the full line position of Fig. 5 by ascrew 39 threaded in the ear 3l) shown at the right of Fig. 7.

In accordance with my invention, the screws 38 and 39 may beinterchanged from the respective positions shown in Fig. 5. If this isdone, the frame 36 may be swung from the full to dot-and-dash lineposition of Fig. 5 about the relocated pin 38 as an axis. 'Ihe advantageof this feature will be hereinafter pointed out.

Mounted in upstanding lugs 48, 40a of the frame 36 is a rod 4I on whicha plurality of rollers 42 are mounted. These rollers 42 comprisesections 42a which coact, respectively, with the aforesaid rollers 32and each roller 42 also comprises sections 4217 which gives Weightthereto. As clearly illustrated in Fig. 3, the rollers 42 are looselymounted on the rod 4I whereby they are biased in a downward directionfor a reason hereinafter to be stated.

The aforesaid frame 36 comprises sections 36a, 36a extending downwardlyoutside of the path of vthe projecting light beam, said sectionscarrying a journaledshaft 43 having a plurality of spaced wheels 44mounted thereon for rotatable movement therewith. Preferably, asillustrated, the wheels 44 are edged and they are so spaced that eachwheel 4'4 coacts with one of the aforesaid fingers 34.

Secured tothe frame 36 is a bracket 45 formed in part as an annulus forthe reception of the casing 46 of an objective lens. I'he'bracket 45also' comprises depending sections which carry a plate 41 on which amirror 48 is suitablyv secured, as by the spring clips 49.

In order to place the herein described projector mechanism in conditionfor operation, the frame 36 is swung on the pivot 38 until said frametogather with the parts carried thereby are moved into the positionshown at the left of Fig. 5. A length of the web W is then drawn throughthe printing device D and laid against the plate 28, said web resting onthe' rollers 32 and projecting therebeyond. The frame 36 is thenreturned to the full line position illustrated in Fig. 5 and the screw33 placed in the position shown to positively lock said frame inoperative position. In so doing, the rollers 44 move against atransverse section of the web W which is gripped between said rollersand the fingers 34. At the same time, the roller sections 42a come intocoacting relation with the respective rollers 32 whereby a secondtransverse section of said web is gripped.

Preferably, as shown in Figs. 1, 2 and 13, an area of the top wall ofthe cabinet C, above the lamp housing 2|, is provided with the slots orpassages 50. The web W is passed through this top cabinet wall C andarranged in overlying relation with respect to this slotted area, saidweb 'extending beyond the cabinet and hanging down at one side thereofas clearly shown in Figs. 1 and 2.

The mechanism with the web W properly positioned therein for theprinting and projecting operations is shown in Figs. 1 and 3. Theprinting mechanism D, as hereinbefore described, comprises the printingwheel I4 which moves stepby-step along the shaft I3 transversely of theweb W, while the latter is stationary, to print a line of informationthereon. At the conclusion of each line-printing operation, the printingwheel 4 is automatically returned to its initial position and,simultaneously, a step of movement is imparted to a train of gearmechanism which includes the gears 5| and 52, Fig. 3. 'Ihe gear 52 iscarried by a stub shaft 53 rotatably mounted in a bracket 54 carried bya rod 55 secured to the frame of the printing device D, the bracket 54being maintained in the proper adjusted position on the rod 55 by ascrew 56,. The shaft 53 is operatively connected to the shaft 3| and,

preferably, a flexible shaft 51 is thus utilized, one end of the shaft51 being connected to the shaft 53, Fig. 4, and the other end of saidshaft 51 being connected to the shaft 3|, Fig. 7.

`The rollers 32 are mounted on the shaft 3|, the web W beinggrippedbetween these rollers and the roller sections 42a. Accordingly,it results that veach return of the printing wheel I4 to its initialposition eifects actuation of the rollers 32 whereby a step of movementis imparted to the web W, the gear ratio being so chosen as to obtainthe desired spacing between the printed lines. As shown in Figs. 1 and2, the web 'W extends over the slotted cabinet area 50 and hangs downbeside the front cabinet wall. The action of gravity on this hanging websection tends to keep the web relatively taut back to the wheels 42.

It follows, therefore, that the web W is moved upwardly step by step tobring the successive lines of printed matter into the projection field,i. e., the field defined by the aperture 28a of plate 28. Light from thelamp 22 passes from right to left, Fig. 3, through the condenser lenses25, 25a, through the aperture 28a, and then through the web sectiondefined by said aperture, the light beam thereafter engaging the mirror48 and being deflected vertically upward through the objective lens 46,said light beam thereafter passing to any suitable reflecting system andscreen, not

v shown, where images appear of the tape `characters then on the websection in the projection field 28a. These images remain stationary onthe screen while the web remains stationary but, each time that theprinting wheel I4 returns to its initial position, the printed lines onthe web are stepped upwardly` to thereby impart corresponding movementto the lines of images on the screen.

An important feature of my invention involves the passage of the web Wexteriorly of the casing C and over the grooves 50. Heated air from thelamp 22 ascends through these grooves and contacts with the overlyingweb sectionto effect rapid drying of the ink thereon. This isadvantageous because permitting the web section beyond the grooves 50 tobe handled without smudging the inked characters thereon.

Another important feature of my invention relates to the disclosedarrangement for transversely gripping the web W at spaced points bothabove and below the projection field.- It is highly important for thatweb section in the projection iield at any given time to besubstantially taut and plane in configuration, i. e., unwrinkled andundistorted. This, in accordance with the present invention, isaccomplished in a highly desirable manner.

Immediately below the projection field, the 4- web W is gripped atspaced .points thereacross by the rollers 44 and the fingers 34 whichcoact, respectively, therewith, the offset weights 34a on each of thefingers 34 functioning to bias the latter toward the rollers 44 withsumcient force to grip the web W in the desired manner. It follows,therefore, that equal restraining forces are applied to the web W atspaced points thereacross and it is against these forces that the web ispulled upwardly by the rollers 32. The latter together with the rollersections 42a also grip the web at spaced points thereacross and, in aneven manner, move the web upwardly against the restraining force appliedthereto by the fingers 34. In practice, it has been demonstrated that aWeb-restraining and -pulling arrangement of the character just describedis highly advantageous and efficient because maintaining the web.section in the projection field plane and even with resultant highlysatisfactory projection. The provision of the edged rollers 44 is highlyimportant because these rollers coact with the freshly inked surface ofthe web W.

However, since these rollers are of knife-edge con-v v34a and the rollersections 42h, gives improved results compared with the springarrangements which heretofore have been generally utilized for biasingpurposes. The heat generated by the projection lamp and other adversefactors cause the force of a biasing spring to vary or change from timeto time. The biasing effect of the above described weights, however, isconstant and lnvariable.

Another important advantage of the herein described invention relates tothe arrangement whereby the frame 35 together with the parts carriedthereby may be swung to one side when it becomes necessary to rethreadthe web through the projector field or otherwise service parts of themachine.4 By virtue of the disclosed arrangement, the web rethreadingoperation is extremely simple and readily performable even by anunskilled worker.

A further feature of importance relates to the interchangeability of thepivot pin for the frame 36. Accordingly, it follows that said frame maybe moved to either of the broken line positions illustrated in Fig. 5,it being necessary simply to reverse the respective positions of thescrews 38 and 39 as desired. It may be desirable thus to interchangethese pivot screws due to some local condition arising in connectionwith a particular installation which might prevent pivotal movement ofthe frame 36 in one direction while permitting free pivotal movement inthe other direction.

In Fig. 2, I have illustrated the printing mechanism D in the servicingposition thereof. The door d of the cabinet C has been removed and ltheturntable 2 has been rotated through an angle of 180 degrees. Thereupon,after release of the latches 8, the printing mechanism is swung 0n thelegs 5, 6 to the extent permitted by the chains I0. It will be observedthat the flexible shaft 51 is of such length that the described movementof the printing device D to servicing position may be effected withoutinterfering with the driving connection between said printing device andthe web-pulling rollers 32. This, obviously, is a distinct advantage.After the printing device D has been returned to normal position, theweb section exteriorly of the cabinet may be grasped to pull the webthrough the projection eld until the slack has been taken up and,thereafter, the normal printing and webpulling action occurs.

Referring to Figs. 11 and 12, there is illustrated a modifiedarrangement for biasing the web into engagement with the rollers 44.Thus, in lieu of the fingers 34, there is utilized a bar 60, the lengthof which is about the same as the width `of the web W. The bar 60 ispivoted for movement in a horizontal plane to a second bar 6| which atone end projects beyond the wall 24 and at its other end projects beyondthe wall 24a. Pivoted exteriorly on each of the walls 24 and 24a is abell crank lever 62 which comprises an offset weight section 62a, thelevers 62 being suitably connected to the respective opposite ends ofthe bar 6|.

The levers 62 tend to move in a clockwise direction, Fig. 12, wherebythe bars 6| and 6|) are biased in a direction from right to left, Figs.11 and 12. The bar 60 comprises a sloping surface and maintains the webW against the rollers 44 with the required degree of pressure, thepivotal mounting for said bar 60 permitting the same to assume theproper operative position with respect to the rollers'44.Thearragngement of Figs. 11 and 12 as thus described gives satisfactoryresults although the arrangement involving the fingers 34, at present,is preferred thereover.

In Figs. 8 and 9, I have illustrated a modification of the invention asregards the driving connection between the printing device D and theprojector mechanism P. As shown, the member 55 supports a bracket 10which carries a stub shaft 1| having secured thereto a cam 12 togetherwith a gear 13 which meshes with the aforesaid gear 5|. Pivoted on thebracket 19 is a frame 14 carrying a cam follower 15 and a mercury switch16, the frame 14 being biased by a spring 11 in a clockwise direction,Fig. 8, whereby the follower 15 is maintained in engagement with the cam12. Leading from the switch 16 is a cable comprising a. pair ofconductors which lead to the respective terminals of a solenoid 18, saidcable including the plug 19 which is readily detachable from the socketfor opening the circuit to the solenoid 18. The solenoid 18 may bemounted on the exterior surface' of the wall 24 and is utilizable foractuating a lever 8| which terminates in a gear segment 82 disposed inmeshing relation with respect to a gear wheel 83 loosely mounted on theaforesaid shaft 3|. Rotatable with the gear wheel 83 is a disk 84 towhich is pivoted a pawl 85 coactable with a ratchet wheel 86 rotatablewith said shaft 3|.

'As clearly appears in Fig. 8, the cam 12 is of the double-surface typeand, as shown in this iigure, the cam is in one of its normalpositions.-

The gear ratio of the train of mechanism leading up to the gears 5| and13 is such that each actuation of said train of mechanism, as effectedby the return of the printing wheel I4 to its initial position, causesthe cam 12 to rotate through an angle of 180 degrees.

It follows, therefore, that when said printing wheel I4 returns to itsnormal position as stated, the cam 12 is rotated counter-clockwise, Fig.8, through an angle of 180 degrees. As a result, the switch 16 is tippedin a clockwise direction, Fig. 8, and the circuit through the solenoid18 is closed. Accordingly, the lever 8| is moved in a counter-clockwisedirection, Fig. 8, to thereby impart a rotatable step of movement to theshaft 3| while the web W is correspondingly moved through the projectionfield.

Movement of the cam 12 through the angle of 180 degrees occurs almostinstantaneously and, as will be obvious, the switch 16 is immediatelyreturned to the position shown in Fig. 8. As a result, the circuitthrough the solenoid 18 is reopened and the lever 8| returns to theposition shown, the pawl 85 idling with respect to the ratchet wheel 86.The mechanism is now in condition to impart the next feeding impulse tolthe web W which occurs, in the manner described, as soon as theprinting wheel |4 again returns to its initial position.

When the application of energy to the shaft 3| is discontinued inresponse to deenergization of the solenoid 18, there occurs some reversemovement of the shaft 3| in a counter-clockwise direction, Fig. 8,unless special mechanism is provided to prevent such reverse movement.Mechanism` for this purpose is illustrated in Figs. 9 and 10.

As shown, a housing is suitably secured to the extension 29 of the wall24 and this housing has a disk 94 rotatable therein, the disk 94 beingsecured to the shaft `3| for rotatable movement therewith. The housing95 comprises a passage having therein a ball 93 biased by a spring 90into engagement with the edge of the disk 94.

When the shaft 3| is moved in web-feeding direction by the pawl 85, itmoves in a clockwise direction, Fig.' 10. During such movement of theshaft 3|, the disk 94 merely thrusts the ball 93 against the spring 90.However, as will be obvious from Fig. 10, the ball 93 functions as alocking dog and positively prevents counterclockwise movement of thedisk 94 and the shaft 3| which is connected thereto.

Since the ball 93 and disk 94 function as just stated, it results thatthe shaft 3| does not recede, even slightly, from the position to whichadvanced by the pawl 85. This is highly desirable because preventing theoccurrence of sag of the web section in the projection field. Shouldthis web section sag, the resultant projection is more or lessunsatisfactory due to poor image focus.

Use of the mechanism last described, namely, the housing 95, disk^94,ball 93 and spring 90 is highly desirable with all forms of myinvention. Hence, in Fig. 7, I have illustrated such mechanism asapplied to the shaft 3l to prevent receding movement thereof after theapplication of 5 energy to the shaft 51 has been discontinued.

With an arrangement of the character described in Figs. 8 and 9, it isnecessary merely to detach the members 19 and 80 when the printingdevice D is to be moved to a position such as l shown in Fig. 2. Ifdesired, the conductor arrangement connected to the members 19 and 80may be of suicient length to permit said printing device D to be movedto the position last named without separation of said members 19 l and80. With such an arrangement, operation of the printing device need notbe discontinued when the latter is in its servicing position.

In the appended claims, it shall be understood that the expressionsmeans for printing,

20 printing device, or equivalent expressions generically comprehend aDow-Jones or other printer, or any equivalent arrangement such, forexample, as a. typewriter, teiautograph, etc. for

.1 producing or forming characters in line form transversely of atraveling web.

While the invention has been described with respect to certainparticular preferred examples which give satisfactory results, it willbe understood by those skilled in the art after under- 30 standing theinvention, that various changes and modications may be made withoutdeparting from the spirit and scope of the invention and it is intendedtherefore in the appended claims to cover all such changes andmodifications,

35 What is claimed as new and desired `to be secured by Letters Patentis:

1. In combination, means for printing characters on a web with ink, aprojector including alamp housing for projecting images of said if icharacters, Ia cabinet for said printing means and projector, said webpassing from said projector across the top wall of said cabinet, and

means whereby heat from said lamp housing has free access to a sectionof the web overlying said 45 top wall so as to dry the ink thereon.

projector, the top wall of said cabinet above said lamp housing beingprovided with passages, said web passing from said projector across thevtop wall of said cabinet and over said passages whereby heat from saidlamp housing dries the 5 ink on the web section overlying said passages.

3. In combination, a projecting device, a printi ing device, a cabinetwithin which said devices are normally received, means for moving one ofsaid devices to the exterior of said cabinet, and a 10 flexible shaftfor transmitting power from one of said devices to the other, said'flexible shaft thus transmitting power when said one device is .eitherinteriorly or exteriorly of said cabinet.

4'. In combination, a projecting device, a print- 15 ing device, acabinet within which said devices are normally received, means formoving said printing device to the exterior of said cabinet, and aexibleshaft for transmitting power from said printing device to saidprojecting device, said 20 iiexible shaft thus transmitting power whensaid printing device is either interiorly or exteriorly of said cabinet.

5. 'I'he combination with a device for printing characters transverselyon a web, said device having a gear wheel actuated at the conclusion ofeach line-printing operation, of means for drawing said web through aprojection field, a shaft for operating said drawing means, a gear wheelin which said shaft terminates, a bracket frame carrying said secondnamed gear wheel, and means for adjusting the position of said frame todispose said second named gear wheel in meshing relation with said firstnamed gear wheel.

6. The combination with a device for printing characters transversely ona web, of a projector and a projection field mounted in fixed position,means for imparting movement to said web to draw the same through saidprojection field at the conclusion of each line-printing operation,means 40 for movably supporting said printing device whereby it may bemoved to a servicing position wherein it is spaced from the xedprojection field, and means whereby said supporting means and saidprinting device may be located in a predev termined position withrespect to said fixed projection eld.

FRANK E. WELLER.

